Enum ExprFnSig

pub enum ExprFnSig<'tcx> {
    Sig(Binder<'tcx, FnSig<'tcx>>, Option<DefId>),
    Closure(Option<&'tcx FnDecl<'tcx>>, Binder<'tcx, FnSig<'tcx>>),
    Trait(Binder<'tcx, Ty<'tcx>>, Option<Binder<'tcx, Ty<'tcx>>>, Option<DefId>),
}

A signature for a function like type.

Variants

Sig(Binder<'tcx, FnSig<'tcx>>, Option<DefId>)

Closure(Option<&'tcx FnDecl<'tcx>>, Binder<'tcx, FnSig<'tcx>>)

Trait(Binder<'tcx, Ty<'tcx>>, Option<Binder<'tcx, Ty<'tcx>>>, Option<DefId>)

Implementations

impl<'tcx> ExprFnSig<'tcx>

pub fn input(self, i: usize) -> Option<Binder<'tcx, Ty<'tcx>>>

Gets the argument type at the given offset. This will return None when the index is out of bounds only for variadic functions, otherwise this will panic.

pub fn input_with_hir( self, i: usize, ) -> Option<(Option<&'tcx Ty<'tcx>>, Binder<'tcx, Ty<'tcx>>)>

Gets the argument type at the given offset. For closures this will also get the type as written. This will return None when the index is out of bounds only for variadic functions, otherwise this will panic.

pub fn output(self) -> Option<Binder<'tcx, Ty<'tcx>>>

Gets the result type, if one could be found. Note that the result type of a trait may not be specified.

pub fn predicates_id(&self) -> Option<DefId>

Trait Implementations

impl<'tcx> Clone for ExprFnSig<'tcx>

fn clone(&self) -> ExprFnSig<'tcx>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'tcx> Copy for ExprFnSig<'tcx>

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 40 bytes

Size for each variant:

• Sig: 40 bytes
• Closure: 40 bytes
• Trait: 40 bytes